#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

int main()
{
	int a = 0;
	scanf("%d", &a);
	int i = 0;
	int count = 0;
	for (i = 0; i < 32; i++)
	{
		if (1 == ((a>>i)&1))
		{
			count++;
		}
	}
	printf("%d", count);
	return 0;
}